Historically, Wu Zetian's skin was smooth and delicate in her later years. According to legend, during the reign of Emperor Guangzong of Tang Dynasty, Zhang Wenzhong, a physician, heard the legend of Bama's rejuvenation and the custom of naked bathing, visited and inspected it many times, and finally made the secret recipe of "rejuvenation" with Bama Mountain Spring. Finally presented to Wu Zetian, said to the queen: This spring water can "nourish" the skin, beauty beauty; Can "nourish" the body, live forever, can "nourish" the taste and prolong life. Wu Zetian was very happy and asked his name. Zhang Wenzhong used his quick wits, and blurted out, "I'm totally convinced.". As the name implies, this is the legendary spring that can raise beauty. Since then, in order to live forever and remain young, Wu Zetian has been ordering people to secretly collect and transport Kezi Spring in Bama, and transport it to the palace for exclusive preparation by the imperial doctor. Thanks to the skill of protecting her face and good maintenance, Wu Zetian's skin remained smooth and delicate in her later years, and finally enjoyed the glory of life at the age of 82, becoming one of the longest-lived emperors in history. That's why there is a saying that Wu Zetian has more Toy Boy in her later years and is still peak sexually in her seventies and eighties!